﻿<!DOCTYPE html>
<html>
<head>
  <title>Realtime Drag Selecting Tool</title>
  <!-- Copyright 1998-2021 by Northwoods Software Corporation. -->
  <meta name="description" content="This customized DragSelectingTool selects and deselects parts continuously while the user is dragging a box, rather than when the tool finishes." />
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <script src="../release/go.js"></script>
  <script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
  <script src="RealtimeDragSelectingTool.js"></script>

  <script id="code">
    function init() {
      if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
      var $ = go.GraphObject.make;  // for conciseness in defining templates

      myDiagram =
        $(go.Diagram, "myDiagramDiv",
          {
            initialDocumentSpot: go.Spot.Center,
            initialViewportSpot: go.Spot.Center,

            // replace the standard DragSelectingTool with one that selects while dragging,
            // and also only requires overlapping bounds with the dragged box to be selected
            dragSelectingTool:
              $(RealtimeDragSelectingTool,
                { isPartialInclusion: true, delay: 50 },
                {
                  box: $(go.Part,  // replace the magenta box with a red one
                    { layerName: "Tool", selectable: false },
                    $(go.Shape,
                      {
                        name: "SHAPE", fill: "rgba(255,0,0,0.1)",
                        stroke: "red", strokeWidth: 2
                      }))
                }
              ),

            // Define the template for Nodes, just some text inside a colored rectangle
            nodeTemplate:
              $(go.Node, "Spot",
                { width: 70, height: 20 },
                $(go.Shape, "Rectangle",
                  new go.Binding("fill", "c")),
                $(go.TextBlock,
                  { margin: 2 },
                  new go.Binding("text", "c"))),

            // Define the template for Links, just a simple line
            linkTemplate:
              $(go.Link,
                $(go.Shape, { stroke: "black" })),

            layout: $(go.TreeLayout)
          });

      myDiagram.model = loadTree();
    }

    function loadTree() {
      // create some tree data
      var total = 49;
      var treedata = [];
      for (var i = 0; i < total; i++) {
        // these property names are also specified when creating the TreeModel
        var d = {
          key: i,  // this node data's key
          c: go.Brush.randomColor(),  // the node's color
          parent: (i > 0 ? Math.floor(Math.random() * i / 2) : undefined)  // the random parent's key
        };
        treedata.push(d);
      }
      return new go.TreeModel(treedata);
    }
  </script>
</head>
<body onload="init()">
<div id="sample">
  <div id="myDiagramDiv" style="background-color: white; border: solid 1px black; width: 100%;height: 600px"></div>
  <p>
  This sample demonstrates the RealtimeDragSelectingTool, which replaces the standard <a>DragSelectingTool</a>.
  Press in the background, wait briefly, and then drag to start selecting Nodes or Links that intersect with the box.
  You can press or release Control (Command on Mac) or Shift while dragging to see how the selection changes.
  </p>
  <p>
  Load it in your own app by including <a href="RealtimeDragSelectingTool.js">RealtimeDragSelectingTool.js</a>.
  Initialize your Diagram by setting <a>ToolManager.dragSelectingTool</a> to a new instance of this tool.
  For example:
  </p>
  <pre>
    myDiagram.toolManager.dragSelectingTool = new RealtimeDragSelectingTool();
  </pre>
  or
  <pre>
    $(go.Diagram, { . . .,
                    "toolManager.dragSelectingTool": $(RealtimeDragSelectingTool, { isPartialInclusion: true }),
                    . . . })
  </pre>
</div>
</body>
</html>
